The LED Lenser P5 is small, lightweight and saves energy, but at the same time produces an amazing 90+ lumens of light. Even more amazing, it operates on only one AA battery. With each nanosecond, the built-in DC/DC converter is pumping energy through the high-performance LED. The P5 also features the Rapid Focus System for quick, one-handed focusing for close-up, or long-distance viewing.